Revamp of touch attack damage calculations

Goal: Make touch attacks equally effective as weapons for built characters while significantly lowering their usefulness for 30HP PKs.

Here is how damage is calculated:
1) Damage = Base Damage (4 to 9 for ToF - on par with a spirit hammer)

2) Damage = Damage scaled by skill (not SP!) from 0% to 100%
This means that you no longer have to worry about SP, only about your percent in the spell, when casting your touch attack. This brings touch attacks in line with weapons.

3) Damage = Damage +5, depending on the casters HPs.
Touch attacks are way faster to level than weapon proficiencies. As a result, proficiency damage is based on the casters HPs instead, gaining 1 bonus damage at 60, 2 at 70 and 5 at 100 HPs.

4) Damage = Damage * Mysticism bonus (works the same as might bonus)

This basically brings touch attacks in line with weapons, allowing them the same damage range and late game use, but curbing their early game PKing potential (together with a change to JoF).